How many types of clownfish are there?
About 28 to 30 species. Most lists give around 28 Amphiprion species plus the Maroon clownfish, which has its own genus, Premnas, in older sources but is now often called Amphiprion biaculeatus. The count shifts because the White-bonnet (A. leucokranos) and Thielle's anemonefish (A. thiellei) are often treated as natural hybrids, and new species such as A. pacificus (2010) and A. barberi (2008) were described recently.
Species without a full profile here because they are rarely or never sold: Chagos anemonefish (Amphiprion chagosensis), Mauritian anemonefish (Amphiprion chrysogaster), Seychelles anemonefish (Amphiprion fuscocaudatus), Madagascar anemonefish (Amphiprion latifasciatus), Oman anemonefish (Amphiprion omanensis), Australian anemonefish (Amphiprion rubrocinctus), Pacific anemonefish (Amphiprion pacificus), White-bonnet anemonefish (Amphiprion leucokranos), Thielle's anemonefish (Amphiprion thiellei).